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1 | /* |
2 | * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c. |
3 | * |
4 | * Copyright (C) 2000 VA Linux Co |
5 | * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> |
6 | * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> |
7 | * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) |
8 | * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) |
9 | * Copyright (C) 2000 Hewlett-Packard Co. |
10 | * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> |
11 | * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs |
12 | */ |
13 | |
14 | #include <linux/kernel.h> |
15 | #include <linux/fs.h> |
16 | #include <linux/types.h> |
17 | #include <linux/file.h> |
18 | #include <linux/icmpv6.h> |
19 | #include <linux/socket.h> |
20 | #include <linux/syscalls.h> |
21 | #include <linux/filter.h> |
22 | #include <linux/compat.h> |
23 | #include <linux/security.h> |
24 | |
25 | #include <net/scm.h> |
26 | #include <net/sock.h> |
27 | #include <net/ip.h> |
28 | #include <net/ipv6.h> |
29 | #include <asm/uaccess.h> |
30 | #include <net/compat.h> |
31 | |
32 | static inline int iov_from_user_compat_to_kern(struct iovec *kiov, |
33 | struct compat_iovec __user *uiov32, |
34 | int niov) |
35 | { |
36 | int tot_len = 0; |
37 | |
38 | while (niov > 0) { |
39 | compat_uptr_t buf; |
40 | compat_size_t len; |
41 | |
42 | if (get_user(len, &uiov32->iov_len) || |
43 | get_user(buf, &uiov32->iov_base)) { |
44 | tot_len = -EFAULT; |
45 | break; |
46 | } |
47 | tot_len += len; |
48 | kiov->iov_base = compat_ptr(buf); |
49 | kiov->iov_len = (__kernel_size_t) len; |
50 | uiov32++; |
51 | kiov++; |
52 | niov--; |
53 | } |
54 | return tot_len; |
55 | } |
56 | |
57 | int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg) |
58 | { |
59 | compat_uptr_t tmp1, tmp2, tmp3; |
60 | |
61 | if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || |
62 | __get_user(tmp1, &umsg->msg_name) || |
63 | __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || |
64 | __get_user(tmp2, &umsg->msg_iov) || |
65 | __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || |
66 | __get_user(tmp3, &umsg->msg_control) || |
67 | __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || |
68 | __get_user(kmsg->msg_flags, &umsg->msg_flags)) |
69 | return -EFAULT; |
70 | kmsg->msg_name = compat_ptr(tmp1); |
71 | kmsg->msg_iov = compat_ptr(tmp2); |
72 | kmsg->msg_control = compat_ptr(tmp3); |
73 | return 0; |
74 | } |
75 | |
76 | /* I've named the args so it is easy to tell whose space the pointers are in. */ |
77 | int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov, |
78 | struct sockaddr *kern_address, int mode) |
79 | { |
80 | int tot_len; |
81 | |
82 | if (kern_msg->msg_namelen) { |
83 | if (mode==VERIFY_READ) { |
84 | int err = move_addr_to_kernel(kern_msg->msg_name, |
85 | kern_msg->msg_namelen, |
86 | kern_address); |
87 | if (err < 0) |
88 | return err; |
89 | } |
90 | kern_msg->msg_name = kern_address; |
91 | } else |
92 | kern_msg->msg_name = NULL; |
93 | |
94 | tot_len = iov_from_user_compat_to_kern(kern_iov, |
95 | (struct compat_iovec __user *)kern_msg->msg_iov, |
96 | kern_msg->msg_iovlen); |
97 | if (tot_len >= 0) |
98 | kern_msg->msg_iov = kern_iov; |
99 | |
100 | return tot_len; |
101 | } |
102 | |
103 | /* Bleech... */ |
104 | #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) |
105 | |
106 | #define CMSG_COMPAT_DATA(cmsg) \ |
107 | ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) |
108 | #define CMSG_COMPAT_SPACE(len) \ |
109 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) |
110 | #define CMSG_COMPAT_LEN(len) \ |
111 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) |
112 | |
113 | #define CMSG_COMPAT_FIRSTHDR(msg) \ |
114 | (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ |
115 | (struct compat_cmsghdr __user *)((msg)->msg_control) : \ |
116 | (struct compat_cmsghdr __user *)NULL) |
117 | |
118 | #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ |
119 | ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ |
120 | (ucmlen) <= (unsigned long) \ |
121 | ((mhdr)->msg_controllen - \ |
122 | ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) |
123 | |
124 | static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, |
125 | struct compat_cmsghdr __user *cmsg, int cmsg_len) |
126 | { |
127 | char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); |
128 | if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > |
129 | msg->msg_controllen) |
130 | return NULL; |
131 | return (struct compat_cmsghdr __user *)ptr; |
132 | } |
133 | |
134 | /* There is a lot of hair here because the alignment rules (and |
135 | * thus placement) of cmsg headers and length are different for |
136 | * 32-bit apps. -DaveM |
137 | */ |
138 | int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, |
139 | unsigned char *stackbuf, int stackbuf_size) |
140 | { |
141 | struct compat_cmsghdr __user *ucmsg; |
142 | struct cmsghdr *kcmsg, *kcmsg_base; |
143 | compat_size_t ucmlen; |
144 | __kernel_size_t kcmlen, tmp; |
145 | int err = -EFAULT; |
146 | |
147 | kcmlen = 0; |
148 | kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; |
149 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); |
150 | while (ucmsg != NULL) { |
151 | if (get_user(ucmlen, &ucmsg->cmsg_len)) |
152 | return -EFAULT; |
153 | |
154 | /* Catch bogons. */ |
155 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) |
156 | return -EINVAL; |
157 | |
158 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
159 | CMSG_ALIGN(sizeof(struct cmsghdr))); |
160 | tmp = CMSG_ALIGN(tmp); |
161 | kcmlen += tmp; |
162 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
163 | } |
164 | if (kcmlen == 0) |
165 | return -EINVAL; |
166 | |
167 | /* The kcmlen holds the 64-bit version of the control length. |
168 | * It may not be modified as we do not stick it into the kmsg |
169 | * until we have successfully copied over all of the data |
170 | * from the user. |
171 | */ |
172 | if (kcmlen > stackbuf_size) |
173 | kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); |
174 | if (kcmsg == NULL) |
175 | return -ENOBUFS; |
176 | |
177 | /* Now copy them over neatly. */ |
178 | memset(kcmsg, 0, kcmlen); |
179 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); |
180 | while (ucmsg != NULL) { |
181 | if (__get_user(ucmlen, &ucmsg->cmsg_len)) |
182 | goto Efault; |
183 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) |
184 | goto Einval; |
185 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
186 | CMSG_ALIGN(sizeof(struct cmsghdr))); |
187 | if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) |
188 | goto Einval; |
189 | kcmsg->cmsg_len = tmp; |
190 | tmp = CMSG_ALIGN(tmp); |
191 | if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || |
192 | __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || |
193 | copy_from_user(CMSG_DATA(kcmsg), |
194 | CMSG_COMPAT_DATA(ucmsg), |
195 | (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) |
196 | goto Efault; |
197 | |
198 | /* Advance. */ |
199 | kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
200 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
201 | } |
202 | |
203 | /* Ok, looks like we made it. Hook it up and return success. */ |
204 | kmsg->msg_control = kcmsg_base; |
205 | kmsg->msg_controllen = kcmlen; |
206 | return 0; |
207 | |
208 | Einval: |
209 | err = -EINVAL; |
210 | Efault: |
211 | if (kcmsg_base != (struct cmsghdr *)stackbuf) |
212 | sock_kfree_s(sk, kcmsg_base, kcmlen); |
213 | return err; |
214 | } |
215 | |
216 | int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) |
217 | { |
218 | struct compat_timeval ctv; |
219 | struct compat_timespec cts[3]; |
220 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
221 | struct compat_cmsghdr cmhdr; |
222 | int cmlen; |
223 | |
224 | if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
225 | kmsg->msg_flags |= MSG_CTRUNC; |
226 | return 0; /* XXX: return error? check spec. */ |
227 | } |
228 | |
229 | if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { |
230 | struct timeval *tv = (struct timeval *)data; |
231 | ctv.tv_sec = tv->tv_sec; |
232 | ctv.tv_usec = tv->tv_usec; |
233 | data = &ctv; |
234 | len = sizeof(ctv); |
235 | } |
236 | if (level == SOL_SOCKET && |
237 | (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { |
238 | int count = type == SCM_TIMESTAMPNS ? 1 : 3; |
239 | int i; |
240 | struct timespec *ts = (struct timespec *)data; |
241 | for (i = 0; i < count; i++) { |
242 | cts[i].tv_sec = ts[i].tv_sec; |
243 | cts[i].tv_nsec = ts[i].tv_nsec; |
244 | } |
245 | data = &cts; |
246 | len = sizeof(cts[0]) * count; |
247 | } |
248 | |
249 | cmlen = CMSG_COMPAT_LEN(len); |
250 | if (kmsg->msg_controllen < cmlen) { |
251 | kmsg->msg_flags |= MSG_CTRUNC; |
252 | cmlen = kmsg->msg_controllen; |
253 | } |
254 | cmhdr.cmsg_level = level; |
255 | cmhdr.cmsg_type = type; |
256 | cmhdr.cmsg_len = cmlen; |
257 | |
258 | if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
259 | return -EFAULT; |
260 | if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
261 | return -EFAULT; |
262 | cmlen = CMSG_COMPAT_SPACE(len); |
263 | if (kmsg->msg_controllen < cmlen) |
264 | cmlen = kmsg->msg_controllen; |
265 | kmsg->msg_control += cmlen; |
266 | kmsg->msg_controllen -= cmlen; |
267 | return 0; |
268 | } |
269 | |
270 | void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) |
271 | { |
272 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
273 | int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); |
274 | int fdnum = scm->fp->count; |
275 | struct file **fp = scm->fp->fp; |
276 | int __user *cmfptr; |
277 | int err = 0, i; |
278 | |
279 | if (fdnum < fdmax) |
280 | fdmax = fdnum; |
281 | |
282 | for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { |
283 | int new_fd; |
284 | err = security_file_receive(fp[i]); |
285 | if (err) |
286 | break; |
287 | err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags |
288 | ? O_CLOEXEC : 0); |
289 | if (err < 0) |
290 | break; |
291 | new_fd = err; |
292 | err = put_user(new_fd, cmfptr); |
293 | if (err) { |
294 | put_unused_fd(new_fd); |
295 | break; |
296 | } |
297 | /* Bump the usage count and install the file. */ |
298 | get_file(fp[i]); |
299 | fd_install(new_fd, fp[i]); |
300 | } |
301 | |
302 | if (i > 0) { |
303 | int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); |
304 | err = put_user(SOL_SOCKET, &cm->cmsg_level); |
305 | if (!err) |
306 | err = put_user(SCM_RIGHTS, &cm->cmsg_type); |
307 | if (!err) |
308 | err = put_user(cmlen, &cm->cmsg_len); |
309 | if (!err) { |
310 | cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); |
311 | kmsg->msg_control += cmlen; |
312 | kmsg->msg_controllen -= cmlen; |
313 | } |
314 | } |
315 | if (i < fdnum) |
316 | kmsg->msg_flags |= MSG_CTRUNC; |
317 | |
318 | /* |
319 | * All of the files that fit in the message have had their |
320 | * usage counts incremented, so we just free the list. |
321 | */ |
322 | __scm_destroy(scm); |
323 | } |
324 | |
325 | /* |
326 | * A struct sock_filter is architecture independent. |
327 | */ |
328 | struct compat_sock_fprog { |
329 | u16 len; |
330 | compat_uptr_t filter; /* struct sock_filter * */ |
331 | }; |
332 | |
333 | static int do_set_attach_filter(struct socket *sock, int level, int optname, |
334 | char __user *optval, unsigned int optlen) |
335 | { |
336 | struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; |
337 | struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
338 | compat_uptr_t ptr; |
339 | u16 len; |
340 | |
341 | if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || |
342 | !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || |
343 | __get_user(len, &fprog32->len) || |
344 | __get_user(ptr, &fprog32->filter) || |
345 | __put_user(len, &kfprog->len) || |
346 | __put_user(compat_ptr(ptr), &kfprog->filter)) |
347 | return -EFAULT; |
348 | |
349 | return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
350 | sizeof(struct sock_fprog)); |
351 | } |
352 | |
353 | static int do_set_sock_timeout(struct socket *sock, int level, |
354 | int optname, char __user *optval, unsigned int optlen) |
355 | { |
356 | struct compat_timeval __user *up = (struct compat_timeval __user *) optval; |
357 | struct timeval ktime; |
358 | mm_segment_t old_fs; |
359 | int err; |
360 | |
361 | if (optlen < sizeof(*up)) |
362 | return -EINVAL; |
363 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || |
364 | __get_user(ktime.tv_sec, &up->tv_sec) || |
365 | __get_user(ktime.tv_usec, &up->tv_usec)) |
366 | return -EFAULT; |
367 | old_fs = get_fs(); |
368 | set_fs(KERNEL_DS); |
369 | err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime)); |
370 | set_fs(old_fs); |
371 | |
372 | return err; |
373 | } |
374 | |
375 | static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
376 | char __user *optval, unsigned int optlen) |
377 | { |
378 | if (optname == SO_ATTACH_FILTER) |
379 | return do_set_attach_filter(sock, level, optname, |
380 | optval, optlen); |
381 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
382 | return do_set_sock_timeout(sock, level, optname, optval, optlen); |
383 | |
384 | return sock_setsockopt(sock, level, optname, optval, optlen); |
385 | } |
386 | |
387 | asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, |
388 | char __user *optval, unsigned int optlen) |
389 | { |
390 | int err; |
391 | struct socket *sock; |
392 | |
393 | if (optlen < 0) |
394 | return -EINVAL; |
395 | |
396 | if ((sock = sockfd_lookup(fd, &err))!=NULL) |
397 | { |
398 | err = security_socket_setsockopt(sock,level,optname); |
399 | if (err) { |
400 | sockfd_put(sock); |
401 | return err; |
402 | } |
403 | |
404 | if (level == SOL_SOCKET) |
405 | err = compat_sock_setsockopt(sock, level, |
406 | optname, optval, optlen); |
407 | else if (sock->ops->compat_setsockopt) |
408 | err = sock->ops->compat_setsockopt(sock, level, |
409 | optname, optval, optlen); |
410 | else |
411 | err = sock->ops->setsockopt(sock, level, |
412 | optname, optval, optlen); |
413 | sockfd_put(sock); |
414 | } |
415 | return err; |
416 | } |
417 | |
418 | static int do_get_sock_timeout(struct socket *sock, int level, int optname, |
419 | char __user *optval, int __user *optlen) |
420 | { |
421 | struct compat_timeval __user *up; |
422 | struct timeval ktime; |
423 | mm_segment_t old_fs; |
424 | int len, err; |
425 | |
426 | up = (struct compat_timeval __user *) optval; |
427 | if (get_user(len, optlen)) |
428 | return -EFAULT; |
429 | if (len < sizeof(*up)) |
430 | return -EINVAL; |
431 | len = sizeof(ktime); |
432 | old_fs = get_fs(); |
433 | set_fs(KERNEL_DS); |
434 | err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); |
435 | set_fs(old_fs); |
436 | |
437 | if (!err) { |
438 | if (put_user(sizeof(*up), optlen) || |
439 | !access_ok(VERIFY_WRITE, up, sizeof(*up)) || |
440 | __put_user(ktime.tv_sec, &up->tv_sec) || |
441 | __put_user(ktime.tv_usec, &up->tv_usec)) |
442 | err = -EFAULT; |
443 | } |
444 | return err; |
445 | } |
446 | |
447 | static int compat_sock_getsockopt(struct socket *sock, int level, int optname, |
448 | char __user *optval, int __user *optlen) |
449 | { |
450 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
451 | return do_get_sock_timeout(sock, level, optname, optval, optlen); |
452 | return sock_getsockopt(sock, level, optname, optval, optlen); |
453 | } |
454 | |
455 | int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) |
456 | { |
457 | struct compat_timeval __user *ctv = |
458 | (struct compat_timeval __user*) userstamp; |
459 | int err = -ENOENT; |
460 | struct timeval tv; |
461 | |
462 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
463 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
464 | tv = ktime_to_timeval(sk->sk_stamp); |
465 | if (tv.tv_sec == -1) |
466 | return err; |
467 | if (tv.tv_sec == 0) { |
468 | sk->sk_stamp = ktime_get_real(); |
469 | tv = ktime_to_timeval(sk->sk_stamp); |
470 | } |
471 | err = 0; |
472 | if (put_user(tv.tv_sec, &ctv->tv_sec) || |
473 | put_user(tv.tv_usec, &ctv->tv_usec)) |
474 | err = -EFAULT; |
475 | return err; |
476 | } |
477 | EXPORT_SYMBOL(compat_sock_get_timestamp); |
478 | |
479 | int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) |
480 | { |
481 | struct compat_timespec __user *ctv = |
482 | (struct compat_timespec __user*) userstamp; |
483 | int err = -ENOENT; |
484 | struct timespec ts; |
485 | |
486 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
487 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
488 | ts = ktime_to_timespec(sk->sk_stamp); |
489 | if (ts.tv_sec == -1) |
490 | return err; |
491 | if (ts.tv_sec == 0) { |
492 | sk->sk_stamp = ktime_get_real(); |
493 | ts = ktime_to_timespec(sk->sk_stamp); |
494 | } |
495 | err = 0; |
496 | if (put_user(ts.tv_sec, &ctv->tv_sec) || |
497 | put_user(ts.tv_nsec, &ctv->tv_nsec)) |
498 | err = -EFAULT; |
499 | return err; |
500 | } |
501 | EXPORT_SYMBOL(compat_sock_get_timestampns); |
502 | |
503 | asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, |
504 | char __user *optval, int __user *optlen) |
505 | { |
506 | int err; |
507 | struct socket *sock; |
508 | |
509 | if ((sock = sockfd_lookup(fd, &err))!=NULL) |
510 | { |
511 | err = security_socket_getsockopt(sock, level, |
512 | optname); |
513 | if (err) { |
514 | sockfd_put(sock); |
515 | return err; |
516 | } |
517 | |
518 | if (level == SOL_SOCKET) |
519 | err = compat_sock_getsockopt(sock, level, |
520 | optname, optval, optlen); |
521 | else if (sock->ops->compat_getsockopt) |
522 | err = sock->ops->compat_getsockopt(sock, level, |
523 | optname, optval, optlen); |
524 | else |
525 | err = sock->ops->getsockopt(sock, level, |
526 | optname, optval, optlen); |
527 | sockfd_put(sock); |
528 | } |
529 | return err; |
530 | } |
531 | |
532 | struct compat_group_req { |
533 | __u32 gr_interface; |
534 | struct __kernel_sockaddr_storage gr_group |
535 | __attribute__ ((aligned(4))); |
536 | } __attribute__ ((packed)); |
537 | |
538 | struct compat_group_source_req { |
539 | __u32 gsr_interface; |
540 | struct __kernel_sockaddr_storage gsr_group |
541 | __attribute__ ((aligned(4))); |
542 | struct __kernel_sockaddr_storage gsr_source |
543 | __attribute__ ((aligned(4))); |
544 | } __attribute__ ((packed)); |
545 | |
546 | struct compat_group_filter { |
547 | __u32 gf_interface; |
548 | struct __kernel_sockaddr_storage gf_group |
549 | __attribute__ ((aligned(4))); |
550 | __u32 gf_fmode; |
551 | __u32 gf_numsrc; |
552 | struct __kernel_sockaddr_storage gf_slist[1] |
553 | __attribute__ ((aligned(4))); |
554 | } __attribute__ ((packed)); |
555 | |
556 | #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ |
557 | sizeof(struct __kernel_sockaddr_storage)) |
558 | |
559 | |
560 | int compat_mc_setsockopt(struct sock *sock, int level, int optname, |
561 | char __user *optval, unsigned int optlen, |
562 | int (*setsockopt)(struct sock *,int,int,char __user *,unsigned int)) |
563 | { |
564 | char __user *koptval = optval; |
565 | int koptlen = optlen; |
566 | |
567 | switch (optname) { |
568 | case MCAST_JOIN_GROUP: |
569 | case MCAST_LEAVE_GROUP: |
570 | { |
571 | struct compat_group_req __user *gr32 = (void *)optval; |
572 | struct group_req __user *kgr = |
573 | compat_alloc_user_space(sizeof(struct group_req)); |
574 | u32 interface; |
575 | |
576 | if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) || |
577 | !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) || |
578 | __get_user(interface, &gr32->gr_interface) || |
579 | __put_user(interface, &kgr->gr_interface) || |
580 | copy_in_user(&kgr->gr_group, &gr32->gr_group, |
581 | sizeof(kgr->gr_group))) |
582 | return -EFAULT; |
583 | koptval = (char __user *)kgr; |
584 | koptlen = sizeof(struct group_req); |
585 | break; |
586 | } |
587 | case MCAST_JOIN_SOURCE_GROUP: |
588 | case MCAST_LEAVE_SOURCE_GROUP: |
589 | case MCAST_BLOCK_SOURCE: |
590 | case MCAST_UNBLOCK_SOURCE: |
591 | { |
592 | struct compat_group_source_req __user *gsr32 = (void *)optval; |
593 | struct group_source_req __user *kgsr = compat_alloc_user_space( |
594 | sizeof(struct group_source_req)); |
595 | u32 interface; |
596 | |
597 | if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) || |
598 | !access_ok(VERIFY_WRITE, kgsr, |
599 | sizeof(struct group_source_req)) || |
600 | __get_user(interface, &gsr32->gsr_interface) || |
601 | __put_user(interface, &kgsr->gsr_interface) || |
602 | copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, |
603 | sizeof(kgsr->gsr_group)) || |
604 | copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, |
605 | sizeof(kgsr->gsr_source))) |
606 | return -EFAULT; |
607 | koptval = (char __user *)kgsr; |
608 | koptlen = sizeof(struct group_source_req); |
609 | break; |
610 | } |
611 | case MCAST_MSFILTER: |
612 | { |
613 | struct compat_group_filter __user *gf32 = (void *)optval; |
614 | struct group_filter __user *kgf; |
615 | u32 interface, fmode, numsrc; |
616 | |
617 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
618 | __get_user(interface, &gf32->gf_interface) || |
619 | __get_user(fmode, &gf32->gf_fmode) || |
620 | __get_user(numsrc, &gf32->gf_numsrc)) |
621 | return -EFAULT; |
622 | koptlen = optlen + sizeof(struct group_filter) - |
623 | sizeof(struct compat_group_filter); |
624 | if (koptlen < GROUP_FILTER_SIZE(numsrc)) |
625 | return -EINVAL; |
626 | kgf = compat_alloc_user_space(koptlen); |
627 | if (!access_ok(VERIFY_WRITE, kgf, koptlen) || |
628 | __put_user(interface, &kgf->gf_interface) || |
629 | __put_user(fmode, &kgf->gf_fmode) || |
630 | __put_user(numsrc, &kgf->gf_numsrc) || |
631 | copy_in_user(&kgf->gf_group, &gf32->gf_group, |
632 | sizeof(kgf->gf_group)) || |
633 | (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, |
634 | numsrc * sizeof(kgf->gf_slist[0])))) |
635 | return -EFAULT; |
636 | koptval = (char __user *)kgf; |
637 | break; |
638 | } |
639 | |
640 | default: |
641 | break; |
642 | } |
643 | return setsockopt(sock, level, optname, koptval, koptlen); |
644 | } |
645 | |
646 | EXPORT_SYMBOL(compat_mc_setsockopt); |
647 | |
648 | int compat_mc_getsockopt(struct sock *sock, int level, int optname, |
649 | char __user *optval, int __user *optlen, |
650 | int (*getsockopt)(struct sock *,int,int,char __user *,int __user *)) |
651 | { |
652 | struct compat_group_filter __user *gf32 = (void *)optval; |
653 | struct group_filter __user *kgf; |
654 | int __user *koptlen; |
655 | u32 interface, fmode, numsrc; |
656 | int klen, ulen, err; |
657 | |
658 | if (optname != MCAST_MSFILTER) |
659 | return getsockopt(sock, level, optname, optval, optlen); |
660 | |
661 | koptlen = compat_alloc_user_space(sizeof(*koptlen)); |
662 | if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || |
663 | __get_user(ulen, optlen)) |
664 | return -EFAULT; |
665 | |
666 | /* adjust len for pad */ |
667 | klen = ulen + sizeof(*kgf) - sizeof(*gf32); |
668 | |
669 | if (klen < GROUP_FILTER_SIZE(0)) |
670 | return -EINVAL; |
671 | |
672 | if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || |
673 | __put_user(klen, koptlen)) |
674 | return -EFAULT; |
675 | |
676 | /* have to allow space for previous compat_alloc_user_space, too */ |
677 | kgf = compat_alloc_user_space(klen+sizeof(*optlen)); |
678 | |
679 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
680 | __get_user(interface, &gf32->gf_interface) || |
681 | __get_user(fmode, &gf32->gf_fmode) || |
682 | __get_user(numsrc, &gf32->gf_numsrc) || |
683 | __put_user(interface, &kgf->gf_interface) || |
684 | __put_user(fmode, &kgf->gf_fmode) || |
685 | __put_user(numsrc, &kgf->gf_numsrc) || |
686 | copy_in_user(&kgf->gf_group,&gf32->gf_group,sizeof(kgf->gf_group))) |
687 | return -EFAULT; |
688 | |
689 | err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); |
690 | if (err) |
691 | return err; |
692 | |
693 | if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || |
694 | __get_user(klen, koptlen)) |
695 | return -EFAULT; |
696 | |
697 | ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); |
698 | |
699 | if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || |
700 | __put_user(ulen, optlen)) |
701 | return -EFAULT; |
702 | |
703 | if (!access_ok(VERIFY_READ, kgf, klen) || |
704 | !access_ok(VERIFY_WRITE, gf32, ulen) || |
705 | __get_user(interface, &kgf->gf_interface) || |
706 | __get_user(fmode, &kgf->gf_fmode) || |
707 | __get_user(numsrc, &kgf->gf_numsrc) || |
708 | __put_user(interface, &gf32->gf_interface) || |
709 | __put_user(fmode, &gf32->gf_fmode) || |
710 | __put_user(numsrc, &gf32->gf_numsrc)) |
711 | return -EFAULT; |
712 | if (numsrc) { |
713 | int copylen; |
714 | |
715 | klen -= GROUP_FILTER_SIZE(0); |
716 | copylen = numsrc * sizeof(gf32->gf_slist[0]); |
717 | if (copylen > klen) |
718 | copylen = klen; |
719 | if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) |
720 | return -EFAULT; |
721 | } |
722 | return err; |
723 | } |
724 | |
725 | EXPORT_SYMBOL(compat_mc_getsockopt); |
726 | |
727 | |
728 | /* Argument list sizes for compat_sys_socketcall */ |
729 | #define AL(x) ((x) * sizeof(u32)) |
730 | static unsigned char nas[19]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3), |
731 | AL(3),AL(3),AL(4),AL(4),AL(4),AL(6), |
732 | AL(6),AL(2),AL(5),AL(5),AL(3),AL(3), |
733 | AL(4)}; |
734 | #undef AL |
735 | |
736 | asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags) |
737 | { |
738 | return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
739 | } |
740 | |
741 | asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) |
742 | { |
743 | return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
744 | } |
745 | |
746 | asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned flags) |
747 | { |
748 | return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); |
749 | } |
750 | |
751 | asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len, |
752 | unsigned flags, struct sockaddr __user *addr, |
753 | int __user *addrlen) |
754 | { |
755 | return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); |
756 | } |
757 | |
758 | asmlinkage long compat_sys_socketcall(int call, u32 __user *args) |
759 | { |
760 | int ret; |
761 | u32 a[6]; |
762 | u32 a0, a1; |
763 | |
764 | if (call < SYS_SOCKET || call > SYS_ACCEPT4) |
765 | return -EINVAL; |
766 | if (copy_from_user(a, args, nas[call])) |
767 | return -EFAULT; |
768 | a0 = a[0]; |
769 | a1 = a[1]; |
770 | |
771 | switch (call) { |
772 | case SYS_SOCKET: |
773 | ret = sys_socket(a0, a1, a[2]); |
774 | break; |
775 | case SYS_BIND: |
776 | ret = sys_bind(a0, compat_ptr(a1), a[2]); |
777 | break; |
778 | case SYS_CONNECT: |
779 | ret = sys_connect(a0, compat_ptr(a1), a[2]); |
780 | break; |
781 | case SYS_LISTEN: |
782 | ret = sys_listen(a0, a1); |
783 | break; |
784 | case SYS_ACCEPT: |
785 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
786 | break; |
787 | case SYS_GETSOCKNAME: |
788 | ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); |
789 | break; |
790 | case SYS_GETPEERNAME: |
791 | ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); |
792 | break; |
793 | case SYS_SOCKETPAIR: |
794 | ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); |
795 | break; |
796 | case SYS_SEND: |
797 | ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); |
798 | break; |
799 | case SYS_SENDTO: |
800 | ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); |
801 | break; |
802 | case SYS_RECV: |
803 | ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); |
804 | break; |
805 | case SYS_RECVFROM: |
806 | ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
807 | compat_ptr(a[4]), compat_ptr(a[5])); |
808 | break; |
809 | case SYS_SHUTDOWN: |
810 | ret = sys_shutdown(a0,a1); |
811 | break; |
812 | case SYS_SETSOCKOPT: |
813 | ret = compat_sys_setsockopt(a0, a1, a[2], |
814 | compat_ptr(a[3]), a[4]); |
815 | break; |
816 | case SYS_GETSOCKOPT: |
817 | ret = compat_sys_getsockopt(a0, a1, a[2], |
818 | compat_ptr(a[3]), compat_ptr(a[4])); |
819 | break; |
820 | case SYS_SENDMSG: |
821 | ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); |
822 | break; |
823 | case SYS_RECVMSG: |
824 | ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); |
825 | break; |
826 | case SYS_ACCEPT4: |
827 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); |
828 | break; |
829 | default: |
830 | ret = -EINVAL; |
831 | break; |
832 | } |
833 | return ret; |
834 | } |
835 |
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